NEET PG DENTAL EXAM

Detailed explanation-1: -The oral vestibule is a small slit-like space between the teeth and inner mucosal lining of the lips and cheeks. The mucosa of the lips and cheeks continues onto the gingiva to form the superior and inferior boundaries of the vestibule.

Detailed explanation-2: -The mucous membrane that lines the structures within the oral cavity limits is known as oral mucosa. This is a wet soft tissue membrane that extends from the junction between the vermilion border of the lips and labial mucosa anteriorly to the palatopharyngeal folds posteriorly.

Detailed explanation-3: -The vermilion border (sometimes spelled vermillion border), also called margin or zone, is the normally sharp demarcation between the lip and the adjacent normal skin. It represents the change in the epidermis from highly keratinized external skin to less keratinized internal skin.